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将遗传算法应用于三角晶格光子晶体的禁带设计过程.考虑到可制备性,算法以第五能级下最大绝对禁带为优化目标,采用粗粒度像素表示原胞结构.通过引入傅里叶变换数据备份机制以提高禁带计算速度和算法效率,从而快速搜索到了具有较大绝对禁带的“介质空气柱”散射体形状的三角晶格光子晶体,其最大绝对禁带的相对宽度值(绝对禁带宽度和中心高度的比值)为23.8%.
The genetic algorithm is applied to the forbidden band design process of triangular lattice photonic crystals. Taking account of the manufacturability, the algorithm takes the maximum absolute forbidden band at the fifth energy level as the optimization objective and uses coarse-grained pixels to represent the original cell structure. Leaf transform data backup mechanism to improve the forbidden band calculation speed and the efficiency of the algorithm so as to quickly search for a triangular lattice photonic crystal with “medium air column” scatterer having a relatively large absolute band gap. The maximum relative absolute band gap width (Ratio of absolute gap width to center height) was 23.8%.